It's priced at $149 with all that, whereas rp4 2GB w. zigbee and PoE would be $45 + $45 + $20 = $110, so price seems reasonable if you need all those things as you're getting the rtc, m.2 and case all in a nice package.
My use would probably only need the Zigbee module and I can 3D print a case, so I'd go with the rp4 especially as I have a bunch lying around anyway! But Seems like a really nice package if you need all those things, and especially PoE is nice to have built in.